Question

3.3 Which of the following is incorrect?
(a) (-22) × (-33) × 20 > 0
(b) (-50) ×321 x 41 > 0
(c) -1 < 20 - (-18) + 36
(d) 4× (-5) × (-1) > -2​

Answer 1

number b is incorrect

Answer 2

Given : (a) (-22) × (-33) × 20 > 0

(b) (-50) ×321 x 41 > 0

(c) -1 < 20 - (-18) + 36

(d) 4× (-5) × (-1) > -2​

To Find : Which  is incorrect

Solution:

(a) (-22) × (-33) × 20 > 0

= 22 * 33 * 20 > 0

LHS is +ve

=> LHS > 0

Hence True

(b) (-50) ×321 x 41 > 0

LHS is negative

Hence LHS < 0

So FALSE

(c) -1 < 20 - (-18) + 36

- 1 <  20 + 18 + 36

- 1 < 74

TRUE

(d) 4× (-5) × (-1) > -2​

20 > - 2

Hence TRUE

so  (-50) ×321 x 41 > 0  FALSE

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