ICSE ICSE Class 8 - CISCE Question Bank Solutions

Use the direct method to evaluate :
`(3/5"a"+1/2)(3/5"a"-1/2)`

Use the direct method to evaluate :
(0.5−2a) (0.5+2a)

Use the direct method to evaluate :
`("a"/2-"b"/3)("a"/2+"b"/3)`

Evaluate: `(3"x"+1/2)(2"x"+1/3)`

Evaluate: (2a + 0.5) (7a − 0.3)

Evaluate: (9 − y) (7 + y)

Evaluate: (2 − z) (15 − z)

Evaluate: (4 − ab) (8 + ab)

Evaluate: (5xy − 7) (7xy + 9) 

Evaluate: `(2"x"-3/5)(2"x"+3/5)`

Evaluate: `(4/7"a"+3/4"b")(4/7"a"-3/4"b")`

Evaluate: (6 − 5xy) (6 + 5xy)

Evaluate: `(2"a"+1/"2a")(2"a"-1/"2a")`

Evaluate: (1.6x + 0.7y) (1.6x − 0.7y)

Evaluate: 203 × 197

Evaluate: 20.8 × 19.2

State, whether the square of the following number is even or odd?

54

State, whether the square of the following number is even or odd?

76

State, whether the square of the following number is even or odd?

75

Add, the pair of rational numbers, given below, and show that their addition (sum) is also a rational number

`(-5)/8` and `3/8`