IBC Quiz #203
01/05/2026
Rohan gowda M.R
Class 8
National public school
Lakshmi
Class 8
Sri Vasavi Vidya samsthe sira
Lokjeeth
Class 8
Vidya jyothi school
Ruju.Y
Class 8
Prudence International School Tumkur Karnataka
Sanjana R
Class 8
Prudence International School
Indu shree
Class 8
Sri Sharada English High school
Unnathi gowda k v
Class 8
Bhavishyath public school
Aishani Bhat
Class 4
KSVK International School
NAGABHUSHANA M
Class 8
Prudence International Residential School
Abhishta Bhat
Class 8
KSVK International School
Note: Quiz prizes will be awarded to ten randomly selected students who submit correct answers before the deadline. Winners will be declared on the website and the weekly newsletter.
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Previous Week Quizzes
IBC Quiz #203
May 01, 2026
Vertex Devices has received an order to manufacture 240 sensor modules for a school innovation kit.
The factory uses one smart production machine with three working modes:
Turbo Mode
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Produces 80 modules per hour
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16 modules per hour fail the quality check
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Running cost = ₹1,200/- per hour
Standard Mode
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Produces 60 modules per hour
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4 modules per hour fail the quality check
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Running cost = ₹800/- per hour
Eco Mode
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Produces 40 modules per hour
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All modules pass the quality check
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Running cost = ₹500/- per hour
The client will pay ₹150/- for each accepted module.
The client requires 240 accepted modules.
If more accepted modules are produced, no additional payment will be made beyond 240 modules.
The company must also follow these rules:
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The full delivery must be completed within 5 hours.
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Each time the machine changes from one mode to another, 30 minutes of recalibration is required.
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During recalibration, no modules are produced.
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Each recalibration costs ₹200/-
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Each rejected module incurs a waste handling cost of ₹25/-
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The total production spending
(machine running cost + recalibration cost)
must not exceed ₹4,500/-
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If the order is delivered after 5 hours, the client will reduce the payment by ₹1,000/- for every started 30 minutes of delay.
Which production plan enables Vertex Devices to complete the order, stay within budget and achieve the highest profit?
Vertex Devices is preparing 180 learning kits for dispatch.
Its smart production machine can run in two modes:
Turbo Mode
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Produces 70 kits per hour
-
Running cost = ₹900/- per hour
Eco Mode
-
Produces 40 kits per hour
-
Running cost = ₹500/- per hour
The company must complete the order of 180 kits within 4.5 hours.
The total machine cost must not exceed ₹2,500/-.
If more than 180 kits are produced, it does not give any extra advantage.
Before production begins, the operations team prepares four approved machine schedules based on machine booking, staff timing, and recalibration requirements. Vertex Devices must choose one of these approved plans and cannot create a new custom plan during dispatch.
Additional Rule
If the machine changes from one mode to another, it needs 30 minutes of recalibration.
During recalibration, no kits are produced.
Which production plan helps Vertex Devices complete the order on time and stay within budget?
IBC Quiz #202
April 24, 2026
Pieter and Lena are participants in a junior science Olympiad held at a university campus in Berlin. Their assigned mentor, Dr Ingrid Brandt, a food chemist at the university, has set up a dissolving experiment in the campus laboratory to challenge the finalists.
Dr Brandt places exactly five grams of sugar into four identical beakers and shares the following rules:
"At room temperature (25 °C) with no stirring, fine sugar powder dissolves at a base rate of 0.5 grams per minute.
Three conditions change this rate:
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Hot water (80 °C) multiplies the base rate by five.
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Cold water (5 °C) multiplies the base rate by 0.5 (it halves the rate).
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Stirring continuously doubles the rate — apply this after the temperature factor.
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Using coarse crystals instead of fine powder halves the rate — apply this last.
Hint: Work out the dissolving rate step by step:
Dissolving rate = base rate × temperature factor × stirring factor × particle size factor
Time to fully dissolve (minutes) = mass of sugar ÷ dissolving rate".
Experimental Conditions 
Question
Using Dr Brandt's rules and the formula, calculate the time (in minutes) for the sugar to fully dissolve in each glass. Which set of values is correct, in ascending order?
Clara and Finn are on a three-day nature camp near a wildlife sanctuary with their classmates. On the second morning, their camp instructor Mr Laurent, introduces a visiting food scientist, Dr Ingrid Brandt, who has set up a "Dissolve Race" in the camp kitchen.
Dr Brandt places exactly five grams of sugar into eight identical glasses of water, each under different conditions. She explains:
"Three things affect how fast sugar dissolves in water — the temperature of the water, whether you stir it and the size of the sugar particles. Of these three, temperature has by far the greatest effect. Even without stirring and with large crystals, hot water will still dissolve sugar far faster than cold water with stirring and fine powder."
Instead of writing words on the glasses, Dr Brandt uses a symbol code from her field notebook:
Symbol Code:
Each glass carries exactly three symbols — one for temperature, one for stirring and one for particle size.
Example: Leaf + Ring + Block means → room temperature water + no stirring + coarse crystals.
Symbol Combinations for Each Glass
Dr Brandt then describes the four glasses she wants Clara and Finn to analyse:
Question
From Glasses A to H, identify which correspond to Glasses 1 to 4 and arrange them in order from fastest to slowest dissolving.
