SUMit Workshop

There are 327 apples. You take 37. How many do you have?

Answer explanation

37

Divide 50 by half and add 20.

Answer explanation

120

It takes 5 machines 5 minutes to make 5 widgets. How many minutes does it take 100 machines to make 100 widgets?

Answer explanation

5

You are in a race. You overtake the person in second place. In which position are you?

Answer explanation

Second

There is a patch of lily pads in a lake. Every day the patch doubles in size. It took 48 days for the patch to cover the entire lake. How long did it take to cover half of the lake?

Answer explanation

47 days

A bat and a ball cost $1.10. The bat costs $1 more than the ball. How much does the ball cost?

Answer explanation

0.05

You buy a lottery ticket, and choose {1, 7, 13, 24, 37, 42}. The winning ticket is {1, 2, 3, 4, 5, 6}. Is it wise to buy another {1, 2, 3, 4, 5, 6} for next week’s draw?

Answer explanation

Yes, it’s just as wise. Every combination has the same odds.

During WW2, planes went to fight, some came back safely and some did not. A mathematician named Abraham Wald was charged of optimizing the armoring of the planes noting that armoring increases impact resistance but decreases maneuverability. The table shows data for the planes that returned and were part of the study. Examine the data and select the area(s) where additional armoring would improve outcomes.

Answer explanation

Engine