R + S means ‘R is the daughter of S’ R = S means ‘ R is the father of S’ R ÷ S means ‘ R is the wife of S’ R × S means ‘ R is the brother of S’ E ÷ F × J + L = M, then how is […]
R + S means ‘R is the daughter of S’ R = S means ‘ R is the father of S’ Read More »
Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation. 17 * 11 * 42 * 2 * 7 = 18 A. – + ÷ ÷ B. – + × ÷ C. – + × × D. + – + × Sol: 17 * 11 * 42
For what value of ‘ p’ is x + ¼ √x+p2 is perfect square. (a) -1/8 (b) 1/8 (c) 1/12 (d) -1/12 Sol:
For what value of ‘ p’ is x + ¼ √x+p2 is perfect square Read More »
A 2.2m tall girl spots an aeroplane moving with the wind in a horizontal line at a height of 86.2m from the ground. The angle of elevation of the aeroplane from eyes of the girl at instant is 60°. After some time, the angle of elevation reduces to 30°. Find the distance travelled by the
Find sec29/cosec61+2 cot8° cot73 ° cot82 ° – 3 (sin238°+sin252°) (a) 0 (b) 1 (c) -1 (d) 4 Sol:
Find sec29/cosec61+2 cot8° cot73 ° cot82 ° – 3 (sin238°+sin252°) Read More »
If the three digit number B9A is a perfect square, find, A-B ? (a) 6 (b) 7 (c) 5 (d) 9 Sol: 142=196 A=6 B=1 A-B=5
If the three digit number B9A is a perfect square, find, A-B Read More »
How many factors of 1040 are perfect squares? (a) 3 (b) 4 (c) 6 (d) 5 Sol: Factors of 1040 24×13×5 If A no. is perfect square power of no. is always even. or zero power of no. – 0, 2, 4, 6 1040→ 24×13×5 1, 4, 16, are factors of no. 1040 also perfect
If (x-1) (x + 1) =1, Find (x+1)³- 1/(x+1)3+4=? (a) 6 (b) 27 (c) 18 (d) 9. Sol:
Vikas score 42 marks in an exam and failed by 2% and Sumit scores 36% and passed by 9 marks in same exam. How much marks they together required to reach 80% in same exam. (a) 144 (b) 160 (c) 150 (d) 120 Sol: ATQ, 42 + 2% = 36% – 9 51 = 34%
