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What will come in place of the question mark (?) in the following number series?
84, ?, 180, 240, 308
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Pattern is-
92 + 3 = 84
112 + 7 = 128
132 + 11 = 180
152 + 15 = 240
172 + 19 = 308
24, 120, ?, 720, 1320
33 − 3 = 24
53 − 5 = 120
73 − 7 = 336
93 − 9 = 720
113 − 11 = 1320
What will come in place of the question mark (?) in the following questions?(You are not expected to calculate exact values)
(5609.01 + 8715.96 + 22425.03) ÷ 13.98 + 12.02 = (?)
Solution (5609 + 8716 + 22425) ÷ 14 + 12 = ? ? = 36750 ÷ 14 + 12 ? = 2625 + 12 = 2637 ≈ 2640
(34.688)2 ÷ 7.322 + √? = 217.299
352 ÷ 7 + √? = 217
√? = 217 – 175
√? = 42
? = 422
? = 1764 ≈ 1767
Rohit sells a table on 40% discount on M.P and bought a table for Rs. 2400 and expect a profit of 25% then M.P of table will be-
He expects profit of 25% by buying table for 2400 Rs then selling price = 2400 x 125%
= 3000 Rs
This 3000 Rs are with 40% discount so M.P will be = 3000 × 100/60 = 5000 Rs.
Akhil and Minu invested in a company in the ratio 8 : 7. If 20% of the total profit donated to an orphanage and Rs 1408 is the share of Akhil in the profit then find the total profit.
Let Rs 150 be the total profit.
Akhil’s share after donation will be = 120 × 8/15 = 64 Rs.
If Akhil’s share is Rs 64 then total profit is Rs 150
So, if Akhil’s share is 1408 then total profit is = 150/64 × 1408 = 3300 Rs.
The average age of 6 employees is 64 years and each has different age. The youngest is 4 years younger than second youngest and second youngest is 4 years younger than third youngest and so on. Find the age of oldest employee.
x + (x+4) + (x+8) + (x+12) + (x+16) + (x+20) = 64 x 6 6x + 60 = 384 6x = 384 – 60 = 324 x = 54 So the age of oldest one is = x + 20 = 54 + 20 = 74 years
5/6 th of a kilometer is rowed by Raman in 35 minutes and in 25 minutes he travelled same distance in return. Now what will be the ratio of speed of Raman and current?
Speed of the man in still water = Q kmph Speed of the current = T kmph So, (Q + T) x 25 = (Q - T) x 35 25Q + 25T = 35Q – 35T 60T = 10Q = Q : T = 6 : 1 Required ratio is = 6 : 1
24 liters of rose water was taken out from a drum having 120 liters of rose water and removed rose water was replaced by equal amount of glycerin. Find the final amount of rose water at the end, when this process was processed one time more.
A person spent 35% of his income on buying trousers and to buy shirts he spent 2/5th of the remaining. After buying trousers and shirts, remaining amount is his saving. If he saves Rs 780 monthly, then his yearly income is:
Let his monthly income be Rs 100
Spend on trousers = Rs 35
Remaining = 100-35 =Rs 65
Spent on shirts = 65 × 2/5 th =Rs 26
Remaining = 65 – 26 =Rs 39
He save Rs 39 when income is Rs 100
When he saves Rs 780, then income = =2000
Yearly income = 12 × 2000 =Rs 24000
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