session 4 set 2

The sum of two one-digit numbers is 17. The smaller number was subtracted from the greater number. What is the difference?

The numbers 0, 1, 2, 7 and 10 are written down on a piece of paper. Annika erased two of the digits and the numbers which remained on the piece of paper were 0, 1 and 10. When she added those numbers she got 11 as a sum. Pippi has her own piece of paper which also has the numbers 0, 1, 2, 7 and 10 written on it. She also erased two digits, correctly added the remaining numbers, but received a sum smaller than Annika. What is the smallest possible sum that Pippi could have gotten?

It is well known that when a die is rolled, the winning number is the one found on top of the die (1, 2, 3, 4, 5, or 6).

When the die shown on the picture was rolled, the winning number was 3. Three dice were rolled and there were three different winning numbers. The sum of the three numbers was 14. What is the smallest winning number we got?

Find the next (fifth) sum

First sum: 0 + 1 = 1

Second sum: 0 + 1 + 1 = 2

Third sum: 0 + 1 + 1 + 2 = 4

Fourth sum: 0 + 1 + 1 + 2 + 4 = 8

John arranged 12 books on his shelf. The book Pippi Longstocking was arranged 8th from left to right. Which place would the same book be at if we were counting from right to left?

The number of one-digit numbers smaller than 5 is 1 less than the number of two-digit numbers smaller than N.

Find N

The numbers 1, 2, 3, and 4 must be placed in the following empty squares in the figure below. Find the value of A.

Arnold and Mary have some pet fish. Mary has 2 fish more than Arnold. Together they have 18 fish. How many fish does Mary have?

All but 7 of a group of 18 children love ice cream. How many of the children do not love ice cream?

Peter and Steven had 18 sweets each. After eating a few of his, Peter has 11 sweets left, and Steven has eaten 10 sweets already. How many sweets are left in total?