International Maths Olympiad Forum By SOF Olympiad Trainer - Page 642

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Subject :IMO    Class : Class 4

Ans 1:

Class : Class 8
3/10

Ans 2:

Class : Class 5
3/20

Ans 3:

Class : Class 3

Ans 4:

Class : Class 5

Ans 5:

Class : Class 4
3/10

Ans 6:

Class : Class 9
2/8 (=10/40) in the morning left only 6/8 3/5 of 6/8 = 18/40 leftover milk is = 1-(10/40) - (18/40) = 12/40 = 3/10

Ans 7:

Class : Class 6
It is 3/20 because- if you add 2/8 and 3/5 =17/20 which he drank =20/20-17/20=3/20

Ans 8:

Class : Class 4
Answer is option B or 3/10

Ans 9:

Class : Class 10
Answer : B
Milk left for the evening = 1 - 2/8 = 6/8
Milk consumed in the evening = 3/5 of 6/8 = 3/5 x 6/8 = 18/40
Total milk consumed = 2/8 + 18/40 = 28/40
Milk left = 1 -28/40 = 12/40 = 3/10

Ans 10:

Class : Class 8
blah blah blahwhatever

Ans 11:

Class : Class 6
3/20Thank you Priti Srivastav

Ans 12:

Class : Class 4
3/20 is correct

Ans 13:

Class : Class 8

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7
a[72]

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Subject :IMO    Class : Class 8

Read the following information carefully to answer the question given below:
The sum of the incomes of A and B is more than that of C and D taken together. The sum of the incomes of A and C is the same as that of B and D taken together. Moreover, A earns half as much as the sum of the incomes of B and D.
If A's income be Rs. 80,000 per annum and the difference between the incomes of B and D be the same as A's income, B's income is _____.

A Rs. 40,000
B Rs. 60,000
C Rs. 80, 000
D Rs. 1,20,000


Ans 1:

Class : Class 8
D part

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 10

Ans 2: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 9

Ans 3:

Class : Class 8
this was an easy one

Ans 4:

Class : Class 9
First add the numbers in opposite and square it. Do the same for all the three pairs, Finally add the three results. You will get the number at the centre Example: 1st one 1+6= 7 7^2 = 49 9 + 4 = 13 13 ^ 2 = 169 3+ 5 = 8 8^ 2 = 64 49+169+64 = 282 All the best...............

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Subject :IMO    Class : Class 8

Two rows of numbers are given. The resultant number in each row is to be worked out separately based on the following rules and the question below the rows of numbers is to be answered. The operations of numbers progress from left to right.
Rules
I. If an odd number is followed by a two-digit even number then they are to be added.
II. If an odd number is followed by a two-digit odd number then the second number is to be subtracted from the first number.
III. If an even number is followed by a number which is a perfect square of a number then the second number is to be divided by the first number.
IV. If an even number is followed by a two-digit even number then the first number is to be multiplied by the second number.

What is the difference between the resultant of the first set of numbers and the second set of numbers?

A 106
B 118
C 210
D 222


Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :IMO    Class : Class 6

Two rows of numbers are given. The resultant number in each row is to be worked out separately based on the following rules and the question below the rows of numbers is to be answered. The operations of numbers progress from left to right.

Rules :

(i) I f a two-digit odd number is followed by a two-digit odd number they are to be added.

(ii) I f a two-digit even number is followed by a two-digit odd number which is a perfect square, the digit number is to be subtracted from the odd number.

(iii) If a three-digit number is followed by a two-digit number the first number is to be divided by the second number.

(iv) I f a prime number is followed by an even number the two are to be added.

(v) I f an even number is followed by another even number the two are to be multiplied.

If X is the resultant of the first row, what is the resultant of the second row?

(A) 192

(B) 128

(C) 132

(D) 144
Please tell me solution

Ans 1:

Class : Class 7
128

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Subject :IMO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
The correct answer is B.

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