IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 822 - 827 of 931
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Question 822
Question
MCQ▾Tea worth ₹ 126 per kg and ₹ 135 per kg are mixed with a third variety in the ratio . If the mixture is worth ₹ 153 per kg, the price of the third variety per kg will be
Choices
| Choice (4) | Response | |
|---|---|---|
a. | ₹ 169.50 | |
b. | ₹ 180 | |
c. | ₹ 175.50 | |
d. | ₹ 170 | |
Question 823
Question 824
Question
MCQ▾If 3 is added to the denominator of a fraction, the fraction becomes 6. If 4 is added to the numerator, the fraction becomes 30, the fraction is ________.
Choices
| Choice (4) | Response | |
|---|---|---|
a. | ||
b. | ||
c. | ||
d. | ||
Question 825
Question
MCQ▾A box contains 8 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 4 more black balls are put in the box, the probability of drawing a black ball is now double of what is was before, then x is________
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 6 | |
b. | 3 | |
c. | 9 | |
d. | 2 | |
Question 826
Question
MCQ▾The option which is not a solution of the equation , is________
Choices
| Choice (4) | Response | |
|---|---|---|
a. | (3,0) | |
b. | (0,2) | |
c. | (-3,4) | |
d. | (1,1) | |
Question 827
Question
MCQ▾How many circles are there in the adjoining figure
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 17 | |
b. | 14 | |
c. | 16 | |
d. | 15 | |