Question Paper
Class / Subject: Class 7 (CBSE) · Mathematics
Chapter: Chapter 15 — Chapter 15: Finding the Unknown
Time Allowed: 15 minutes
Max Marks: 6
1. 'Twice a number is 10' is written as: [1]
(A) 2x=10
(B) x+2=10
(C) x-2=10
(D) x/2=10
2. 'A number decreased by 4 equals 9' is written as: [1]
(A) x-4=9
(B) x+4=9
(C) 4-x=9
(D) 4x=9
3. The phrase 'increased by' in a word problem usually translates to: [1]
(A) addition
(B) subtraction
(C) multiplication
(D) division
4. Solving x+5=12 gives x equal to: [1]
(A) 7
(B) 17
(C) 5
(D) 60
5. Solve for x: 3x=15. [1]
(A) x=5
(B) x=45
(C) x=12
(D) x=18
6. To isolate a variable in an equation, we: [1]
(A) perform the same operation on both sides
(B) only change one side
(C) ignore the equals sign
(D) remove the variable directly without operations