Qno1. 8/2(2+2)
4(4) = 16 ans
Qno2. (2^2)^3
2^5 = 64 ans
Qno3. 20+30x0+1
20+0+1 =21 ans
Qno4. √3^n = 81
n=8
√3^8 =81
√6561 =81
81=81 ans
Qno5. 3/15 = x/20
20.3 =15.x
60 = 15x
60/15 = x
4 = x Ans
Qno6. Find the value of ( 3^0 + 4^-1).2^2
(3^0 + 4^-1).2^2
(1 + 1/4).4
(2/4).4 = 8/4 =2 ans
Qno7. 5+5x5+5
5+25+5 =35 ans
Qno8. 5n-5=10
5(3)-5=10
15-5=10
10=10 ans
Qno.9. 10+ 10 x 10
10 + 100 = 110 ans
Qno10. 3 + 3 x 3 +3
3 + 9 + 3
15 ans
Qno11. 2x - 3y = 15 , x - 3y = 9 find x value ?
Sol. 2x - 3y = 15
x - 3y = 9.
x = 9 + 3y
x value Put in 2x - 3y = 15
2(9+3y)-3y = 15
18 + 6y -3y = 15
18 + 3y = 15
3y = 15 - 18
Y = 3/3 = 1
Y = 1 these value put on x - 9y = 9
X - 9(1) = 9
X = 9 +9
X = 18
again y value put on 2x - 3y = 15
2x - 3(1) = 15
2x = 15 + 3
X = 18/2
X = 9 ans
Qno12. 3 x 3 + 8 / 2
Sol. 3 x 3 + 4
9 + 4 = 13 ans
Qno13. Different of two squares consider the expansion of (x-4) (x+4)
Sol. (x-4).(x+4)
x(x+4)-4(x+4)
x^2 + 4x -4x -16
x^2 - 16 ans
Qno14. (x-2) (x+2)
Sol. (x-2).(x+2)
x(x+2)-2(x+2)
x^2 + 2x -2x + 4
X^2 -4 ans
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