Question

9. 15625 = ? (a) 55 (b) 65 (c) 75 (d) 85 10. Sum of the first n odd natural numbers is (a) 2n + 1 darab (b) n2 (c) it-1 cama (d) 2n? + 1 " 11. If 12+ V« = 3, then x = (2) 1 (b) A (c) 7 (d) 49.

11th - 12th Class

Maths

Solution

116

4.0 (1 ratings)

( 9 longdiv { 5 6 2 5 } = sqrt { ( 7 5 ) ^ { 2 } } = 7 5 ) (16) Sum of ( 1^{5 t} ) odd national ( m=frac{n^{2}}{2} ) ( sqrt{1}-sqrt{2+sqrt{x}}=3 ) synaring both sides ( rightarrow ) ( 2+sqrt{x}=9 Rightarrow sqrt{x}=7 ) ( Rightarrow quad x=49 )