a) 39 : 25 b) 25 : 39 c) 27 : 41 d) 41 : 27 correct answer is: b) 25 : 39 Explanation Here, [cross multiply] Now, [put the value ‘x’] ...

a) 7 b) 4 c) 3 d) 2 correct answer is: d) 2 Explanation [cross multiply] [interchange] The value of is Ans:

a) 141 b) 131 c) 121 d) 120 correct answer is: c) 121formula use: (a-b)2=a2 – 2.a.b + b2 EXPLANATION Put the value of Ans : ...

a) b) c) d) correct answer is: d) Explanation Ans:

a) 9 b) 8 c) 6 d) 5 correct answer is: c) 6formula use: (a-b)2 = a2 – 2.a.b + b2 Explanation [L.C.M] [add square in both side] [cross ...

a) b) c) d) correct answer is: a) Explanation [cross multiply] [interchange] or Ans: Another ...

a) 3 b) 9 c) 7 d) 5 correct answer is: b) 9 Explanation [cross multiply] Ans:

formula use:1st formulaprove: [proved] 2nd formulaprove: [proved] Explanation Here, Now, [put the value of ‘ 4ab’ & ‘2(a2 + b2)’] Ans: The value of ...

in this calculus. formula used, or Explanation Here, [L.C.M] [add square in both side] [cross multiply] Now, [L.C.M] [ put the ...

In this factorization, formula used: Explanation [rearrange] Ans: