Math Weekly Challenge

When David was eight, his little brother Alex was half his age. David is 30 now. How old is Alex?

• Alex is 36

• Alex is 26

• Alex is 16

• Alex is 46

Double me, then add 10. You get 34. What number am I?

Amy has as many apples as there are months in a year. How many apples does she have?

• 12 apples

• 22 apples

• 15 apples

• 30 apples

Bob adds three numbers. Afterward, he multiplies the same numbers and gets the same result. What are these numbers?

• 2,3,4

• 3,4,5

• 1,2,3

• 4,5,6

A farmer has 17 sheep. All but 9 run away. How many does he have left?

Fill in the blank: 81, 72, 63, ___, 45

Zoey has a very big family. She has 20 aunts, 20 uncles and 50 cousins. Each of her cousins has an aunt who is not Zoey's aunt. How is this possible?

• Their aunt is Zoey's sister

• Their aunt is Zoey's daughter

• Their aunt is Zoey's Mom

There are some chickens and cows on a farm. There are 10 animals in total. Altogether, they have 28 legs. How many chickens and how many cows are there?

• 5 chickens and 5 cows

• 6 chickens and 4 cows

• 4 chickens and 6 cows

• 7 chickens and 3 cows

I am a number. I add 5 to myself and the result is 12. What number am I?

• 5

• 0

• 7

• 1

You're running a race and at the very end, you pass the person in 2nd place. What place did you finish the race in?

• you finished in 2nd place

• you finished in 1st place

• you finished in 3rd place