Mathlish_SQuiz 3-4_Logical Thinking 4

Work backward to find the number in the question mark.

• 42

• 75

• 65

• 100

Work backward to find the number in the question mark.

• 120

• 112

• 130

• 102

A number is added to 3. The sum is then multiplied by 5. When 8 is subtracted from the product, the result is 12. What is this number?

• 1

• 2

• 3

• 4

There were 36 cars in parking lot A and parking lot B altogether.

4 cars drove out from parking lot A. 5 cars drove out from parking lot B to parking lot A, the number of cars in parking lot A was 3 times those in parking lot B. How many cars were there in parking lot A at first?

• 13

• 15

• 23

• 32

16 sparrows were resting on two trees. 2 sparrows flew away from the second tree, 5 sparrows flew from the first tree to the second tree. The two trees now had the same number of sparrows. How many sparrows were there on the first tree at first?

• 5

• 7

• 8

• 12

There are a total of 28 chickens and rabbits in a farm. The animals have a total of 72 legs. How many chickens are there?

• 8

• 12

• 20

• 28

A pen cost $4 and a book cost $7. Samuel paid $64 for 10 such pens and books. Find the number of books he had bought.

• 8

• 6

• 4

• 2

Alice has 51 marks and Peter has 61 marks in Mathematics exam. If the average mark of Alice, Peter and Mary is 58, what is Mary’s exam marks?

• 55

• 56

• 60

• 62