International Maths Olympiad Forum By SOF Olympiad Trainer - Page 163

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Arjun Trivedi from Sardar Patel Vidyalaya, Delhi

Subject :IMO Class : Class 10

How many symbol and numbers are there in the sequence which are either immediately preceded or immediately followed by the letter which is from the first half of the English alphabet?
2 P J @ 8 $ L B I V # Q 6 δ G W 9 K C D 3 © • £ 5 F R 7 A Y 4

A 6
B 7
C 8
D 9

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Aviral Goyal from DPS RKP, New Delhi

Subject :IMO Class : Class 7

Area of the shaded portion is ______.

A 100 cm²
B 110 cm²
C 120 cm²
D 125 cm²

idk

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Anu Elizabeth Alexander from Sishya, Chennai

Subject :IMO Class : Class 5

There is a certain relationship between figures P and Q. Establish a similar relationship between figures R and S by selecting a suitable figure from the options which will replace (?) in figure S.

A
B
C
D

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Sankalp Singh from DPS, GBN, Noida

Subject :IMO Class : Class 9

In the given figure, AD is the bisector of ∠A and AB = AC. Then ΔACD and ΔABD are congruent by which criterion ?

A AAA
B SAS
C SSA
D Both (B) and (C)

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Ans 1:

Aadarsh Mutyala from The Heartfulness Learning Centre, Hyderabad

Class : Class 9

Ans 2:

SHRIYA NARENDRA from INDIAN SCHOOL AL GHUBRA, MUSCAT

Class : Class 9

Option B is correct. AB=AC (given) AD is common side

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Sankalp Singh from DPS, GBN, Noida

Subject :IMO Class : Class 9

In the given figure, ΔABC and ΔPBC are two isosceles triangles on the same base BC and vertices A and P are on the same side of BC. A and P are joined, then

A
B
C
D ∠BAP = 2∠BAC

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Sharanyaa Tripathi from Uttam school for girls, Ghaziabad

Subject :IMO Class : Class 7

There are three places A, B, C in a straight line as shown below. If distance between place A and B is (2.4 × 10⁶) m and distance between B and C is (5.2 × 10⁵) m, then find the distance between place A and C in standard form.

A (292 × 10⁶) km
B (2.92 × 10⁶) m
C (292 × 10⁵) m
D (2.92 × 10⁴) m

The calculation is wrong, the answer is meant to be D....

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Ans 1:

vibhu mandala from whyshouldyouknow, chennai

Class : Class 8

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IMO Kids from Hiranandani foundation school , Powai

Subject :IMO Class : Class 7

A square has ______ lines of symmetry.

A One
B Two
C Three
D Four

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Shweta Garg from Vibgyor high, Vadodara

Subject :IMO Class : Class 9

Evaluate the following :
(i) The sum of length, breadth and depth of a cuboid is 19 cm and the length of its diagonal is 11 cm, then find the surface area of the cuboid.
(ii) If the radii of two circular cylinders are in the ratio 3 : 4, and their heights are in the ratio 6 : 5, then find the ratio of their curved surface areas.

	(i)	(ii)
A	180 cm²	9 : 11
B	240 cm²	9 : 10
C	120 cm²	8 : 5
D	321 cm²	7 : 10

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S Malhotra from SFS , New Delhi

Subject :IMO Class : Class 3

Sonam went to a bird sanctuary and saw the different types of birds. Given pictograph shows the number of birds she saw. Study the pictograph and answer the questions.

How many sparrows did Sonam saw?

A 35
B 40
C 50
D 45