IMO Level 2- Mathematics Olympiad (SOF) Class 7: Questions 12 - 15 of 299

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Question number: 12

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Appeared in Year: 2013

MCQ▾

Question

Prabir started walking towards South. He took a right turn after walking 10 metres. He again took a left turn after walking 20 metres. Which direction is he facing now?

Choices

Choice (4)Response

a.

South

b.

West

c.

East

d.

North

Question number: 13

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Appeared in Year: 2014

MCQ▾

Question

A person borrows for 2 years at p. a. simple interest. He immediately lends it to another person at p. a. for 2 years. Find his gain in the transaction per year.

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

Question number: 14

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Appeared in Year: 2013

MCQ▾

Question

If ‘M’ denotes ‘R’ denotes ; ‘K’ denotes and ‘B’ denotes ; then

Choices

Choice (4)Response

a.

314

b.

c.

d.

50

Question number: 15

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Appeared in Year: 2014

MCQ▾

Question

A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Given below are the steps to find the number. Identify the wrong step.

Step 1: Let the unit’s digit be x.

Step 2: Then, ten’s digit .

number

Step 3: Adding 27 to the number we get .

Step 4: Number with digits interchanged is

Step 5:

Step 6: Therefore, unit’s digit and ten’s digit

Step 7: Hence the number

Choices

Choice (4)Response

a.

Step 4

b.

Step 7

c.

Step 5

d.

Step 3 and step 6

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