Practice questions for simplification



Question 1:

What should come in place of question mark(?) in following question?

40% of 300 + 50% of 600=?
  • 450
  • 430
  • 530
  • 420
  • none of these

Answer.

Answer

by using reciprocals of percentage
Reciprocal of 40 is 4/10
Reciprocal of 50 is 1/2
4/10 * 300 + 1/2 *600
=>4*30+300
=>120+300
=420

Question 2:

What should come in place of question mark(?) in following question?

33.33% of 300 + ? of 100=125
  • 22%
  • 25%
  • 35%
  • 04%
  • none of these

Answer

Answer

by using reciprocals of percentage
Reciprocal of 33.33% is 1/3
1/3 * 300 + x% * 100 =125
100+x*100/100=125
x=125-100
X%=25%

Question 3:

What should come in place of question mark(?) in following question?

4056 / 26 of 26-(36)1/2=?
  • 0
  • 6
  • 26
  • -6
  • none of these


Answer

Answer

1) 26 of 26 is 26*26 =676 (find out square of 26 ->(2)2 (2*2*6) (6)2->4 24 36->(4+2)(4+3)(6)->676)
2)4056/26*26->4056/676->6
3)(36)1/2= 6
ans 6-6=0

Question 4:

What should come in place of question mark(?) in following question?

18.18 /9+2.7 of 3 =?
  • 10.13
  • 10.12
  • 101.2
  • 27.32
  • none of these


Answer.

Answer

18.18/9->2.02
2.7of 3->2.7*3->8.1
18.18/9+2.7*3=>2.02+8.1=>10.12
Ans 10.12

Question 5:

What should come in place of question mark(?) in following question?

286 + 33641/2=?-125 ?
  • 470
  • 469
  • 368
  • 570
  • none of these



Answer.

Answer

1) 33641/2=>58( how to quickly find square root?) 2)check last digit 286 +58 =? -125, so last digits L.H.S= 6+8=14 and R.H.S =x-5, so 4=x-5 so last digit is 9 of term to be found out
now only 2nd option have last digit 9 so 469 is answer

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