STEM Math 2-3

Act one: Kate and Peter switch places.

Act two: Subtract the numeric value of the number in Mary’s hand from the digit

value of the number in Kate’s hand.

What is the result of the subtraction?

• 4

• 398

• 580

• 598

The first carriages of the trains above have the number 3 on them. The

numbers on the subsequent carriages of the first train are obtained by counting

rhythmically by fives. The numbers on the subsequent carriages of the second

train are obtained by counting rhythmically by sevens.

Which of the following numbers can be on carriages of both trains?

• 24

• 28

• 38

• 59

• 49

• 50

• 51

• 52

One yellow bead is taken from the first abacus and placed on the hundreds digit

of the second abacus. Then, 2 purple beads are taken from the first abacus and

placed on the tens digit of the second abacus.

What is the difference between the numbers formed on these two abacuses?

• 98

• 108

• 218

• 338

In the operation above, the elephant and the giraffe each represent a number.

What is the value of elephant + giraffe?

• 36

• 41

• 58

• 64

How much is our total price?

• 12

• 14

• 16

• 18

• 255

• 325

• 440

• 290

The tens digit of a two-digit number is 3 and the ones digit of another two-digit number is 9.

The difference of the first number and the second number is 17.

What is the sum of these two numbers?

• 43

• 49

• 55

• 59

The elevator above can carry a maximum of 240 kilograms.

Which two people should get off this elevator so that the elevator can move?

• Tom-Tina

• Nell-Bert

• Tom-Lulu

• Nell-Tina

What is the difference between the largest and the smallest number given?

• 817

• 482

• 743

• 847