# IJSO (Indian Junior Science Olympiad) Mock Paper – Mathematics, Physics, Chemistry and Biology Part 2

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15. If , where x, y, z are natural numbers, then x, y, z are:

A. 1,2, 5

B. 1,5, 2

C. 5,2, 11

D. 11,2, 5

16. Find the value of

A. 2

B. 3

C. 5

D. 1

17. If , then k is equal to:

A.

B.

C.

D. 2

18. Find the remainder of where

A. 10

B. 5

C. 15

D. None of these

19. What least number must be added to each of the numbers 5,11, 19 and 37 so that they are in proportion?

A. 6

B. 2

C. 4

D. 9

20. is equivalent to

A.

B.

C.

D. None of these

## Physics

21. A man throws a ball making an angle of with the horizontal. He runs on a level ground and catches the ball. If lie had thrown the ball with speed v, then his speed must be:

A.

B.

C.

D.

22. A particle is moving eastwards with a velocity of 5 m1s. In 10 seconds, the velocity changes to 5 m/s northwards. The average acceleration of the particle is:

A. 0

B. towards north-west

C. towards north-east

D. towards sputh-east

23. Three projectile A, B and C are thrown from the same point in the same plane. Their trajectories are shown in the figure. Then which of the following statement is true:

A. The time of flight is the same for all (lie three

B. The launch speed is greatest for particle C

C. The horizontal velocity component is greatest for particle C

D. All of the above

24. A car is moving with velocity V. If car stop after applying break at a distance of 20m. If velocity of car is doubled, then how much distance it will cover (travel) after applying break:

A. 40 m

B. 80 m

C. 160 m

D. 320 m