Mathematics Class 7th

21. A / B + C / D = C/D + A/B

A. Associative property

B. Commutative property 

C. Multiplicative property

D. None of these

22. The additive inverse of -1/2 is ____

A. ½

B. 0.5

C. -1/2

D. None of these

23. All integers are rational number

A. 0 has No reciprocal

B. 1 is the reciprocal of itself

24. When numbers are expressed in decimal form, the division process will either be terminating or non-terminating.

A. True

B. False

25. _____ decimal are decimals having a finite number of digits after the decimal.

A. Terminating

B. Non terminating

C. Repeating

D. None of these

26. 0.375 is a _____ decimal.

A. Terminating

B. Non terminating

C. Repeating

D. None of these

27. 3/8 is a _____ fraction

A. Proper 

B. Improper

C. Common

D. None of these

28. 16/7 is a ____ fraction.

A. Improper

B. Proper

C. None of these

29. 2.28555555….. Is a ____ decimal.

A. None terminating 

B. Terminating

C. None of these

30. 2/7 is a ____ decimal.

A. Recurring 

B. Non-recurring

C. None of these

31. _____ decimal are non-terminating decimals in which a single digit or block of digits repeats itself infinite number of times.

A. Recurring

B. Non-Recurring

C. None of these

32. Round off 72.36 to the nearest tenth.

A. 73

B. 72.3

C. 72.4

D. None of these

33. Round off 72.84 to the nearest tenth.

A. 73

B. 72.9

C. 72.8

D. None of these

34. Two powers that have the same ____ add the exponents.

A. Base

B. Powers

C. None of these

35. 3^5 * 3^3 = _______

A. 3^2

B. 15^8

C. 3^15

D. 3^8

36. If the powers are same and bases are different, than ______ the bases.

A. Add

B. Multiply 

C. Divide

D. None of these

37. To divide two powers that have the same base, ______ the exponents.

A. Add

B. Subtract

C. Divide

D. None of these

38. To find the power of a power, ______ the exponents.

A. Add

B. Subtract

C. Multiply

D. None of these

39. Any raised to the zero power is ____

A. 0

B. 1

C. -1

D. None of these

40. The area of circle is πr^2.

A. True

B. False