Approximation Test 7-Solved questions with detailed explanations for SSC, IBPS, SBI PO, RRB, RBI, CSE, CGL, CHSL, CDA, CSE, UPSC

1)

What approximate value should come in place of the question mark (?) in the given questions?

(629.715-238.938)×8.451=?

[Bank Of Maharastra (PO), 2007]

A)
3825
B)
4175
C)
4500
D)
2950
E)
3500

Discussion

2)

(48×296)÷(19×173)=?

A)
2
B)
4
C)
8
D)
9
E)
3

Discussion

3)

3784÷28+538=?

A)
600
B)
623
C)
651
D)
636
E)
673

Discussion

4)

$\frac{4}{5} \times \frac{3}{7} \div \frac{6}{7} \div \frac{5}{9} = ?$

A)
$(\frac{9}{17})$
B)
$(\frac{20}{49})$
C)
$(\frac{18}{25})$
D)
$(\frac{1}{2})$
E)
$(\frac{4}{7})$

Answer: Option C

Explanation

Given,

$\frac{4}{5} \times \frac{3}{7} \div \frac{6}{7} \div \frac{5}{9} = ?$

It can also be written as

$= \frac{4}{5} \times \frac{3}{7} \div \frac{6}{7} \div \frac{5}{9} = \frac{4}{5} \times \frac{3}{7} \times \frac{7}{6} \times \frac{9}{5} = \frac{4}{5} \times \frac{1}{2} \times \frac{5}{9} = \frac{2}{5} \times \frac{9}{5} = \frac{18}{25}$

Hence, Option C is correct.

For more Short tricks and formulae click

Approximation

Discussion

5)

623898×99=?×60000

A)
1000
B)
1030
C)
1050
D)
1065
E)
1010

Discussion

Approximation Test-7 (Complete Revision)

Answer: Option E

Answer: Option B

Answer: Option E

Answer: Option C

Answer: Option B