Solution:

200

To pass the exam ravish needs 40 + 40 = 80 marks.

=> (80/40) *100 = 200

Solution:

The check was for dollars 31.63.

The bank teller gave her dollars 63.31
She spent .05, and then she had dollars 63.26, which is twice the check.

Let x be the dollars of the check, and y be the cent.

The check was for 100x + y cent
He was given 100y + x cent

Also
100y + x - 5 = 2(100x + y)
Expanding this out and rearranging, we find:
98y = 199x + 5

or 199x ≡ -5 (mod 98)
or 98*2*x + 3x ≡ -5 (mod 98)
3x ≡ -5 ≡ 93 (mod 98)
this quickly leads to x = 31

Solution:

Winner = 300
Loser1 = 247
Loser2 = 221
Loser3 = 195


Explanation :

Loser1 = Winner- 53
Loser2 = Winner- 79
Loser3 = Winner- 105

Winner+ Winner- 53 + Winner- 79 + Winner- 105 = 963
4Winner= 1,200
Winner= 300

Loser1= 300 - 53
Loser1= 247

Loser2 = 300 - 79
Loser2 = 221

Loser3 = 300 - 105
Loser3 = 195

Answer: Winner= 300, Loser1= 247, Loser2 = 221, Loser3 = 195

Verify the ans
=> 300 + 247 + 221 + 195
=> 963

Solution:

Man1 is carrying 5 bags and the Man2 is carrying 7 bags.

Let's assume that the Man1 was carrying M1 bags and the Man2 was carrying M2 bags.
M2 + 1 = 2 * (X-1)
M2 + 1 = 2M1 - 2
M2 = 2M1 - 3

Also,
M2 - 1 = M1 + 1
M2 = M1 + 2

=>
2M1 - 3 = M1 + 2
M1 = 5

=>
M2 = 7

Solution:

8

Solution:

34

Solution:

Forty

Solution:

2(remember bodmas)

Solution:

60

Solution:

125874 => 251748

251748 is twice the 125874 and have same digits 1,2,4,5,7 & 8