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what power of 8 exactly divides 25!?
Ans Will it be 25/8 since 8 appears in 25! expansion or is there another method since 8 will not just divide 8 in 25! but other multiples of 8 in 25! , which is difficult without calculator .
Asked by 8 months ago , View All Answers
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sir i have a doubt in Q.20 , My answer is 174km
as B travelled 72 km for 1st hr. then again in 93 (48+45)min it will cover 72 km, and then in 45 min that is total time taken for both a and b to meet b would have covered a distance of 30km
so total distance in my case is 72+72+30=174
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A lady went to the market with a few Rs 1 notes and a few 20-paise coins. When she returned she had as many Rs1 notes as she originally had 20-paise coins and vice versa. She actually came back with about one-third of what
she had gone with. How much did she spend in the market?1)Rs. 14,40
2)Rs. 14.70
3)Rs 15.50
4)Rs 17.40
5)None of these
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(x) = 2x; where x is an integer. If we arrange the values of f(x) for x = 25, 24, 23 … (continuously decreasing value
of x), we get an Arithmetic Progression (AP) whose first term is 50. Find the maximum value of the sum of all the
terms of the AP.1)600
2)625
3)650
4)675
5)None of these
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Thirty trees are planted in a straight line at intervals of 5 m. To water them the gardener needs to bring water for
each three separately from a well, which is 10 m from the first tree in line with the trees. How far will be have to walk
in order to water all the trees, beginning with the first tree? Assume that he starts from the well.1)4, 785 m
2)4, 795 m
3)4, 800 m
4)4, 810 m
5)None of these
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The least number when divided by 48,60,72,108 and 140 leaves 38,50,62,98,130 as remainders is? Solution given is 48-38=10, 60-50 =10, 72-62 =10...so on . Then LCM (48,60,72,108,140)-10 = answer . My question why subtract divisor and remainder.. pls explain in a simple way as I am very confused with the method
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Direction: Mark the best answer:If x =cy + bz, y = az + cx, z =bx + ay and x, y, z are not all zero, then:1)a2 + b2 + c2 + 2abc = 1
2) a2 + b2 + c2 + 2abc =0
3) a2 + b2 + c2 – 2abc =1
4) a2 + b2 + c2 – 2abc =0
5)none of these
if we take x=y=z=1then we ll get a=b=c=1/2
by substutuing in the answers ll get 1st optin as correct wats wrong in this method plz tell me
Asked by 9 months ago, View All Answers
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The water stored in a tank, used at the uniform rate, lasts for 80 days. If two exactly similar holes are made in the tank, its will last only for 48 days. How long will it last if only one hole is made?1)60 days
2)64 days
3)72 days
4)89 days
5)None of these
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in how many ways can 5 different color balls be put in 3 boxes?
ans . ist box can have any of the 5 balls , 2nd can have any of the left over 4 balls , 3rd box can have any of the 3balls of different colors . Hence ans 5*4*3 .
but your book gives a different answer i think 5^3
Asked by 9 months ago , View All Answers
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Hi Team,
Please explain me the below problem.
Regards,
Raj.
If A sqrt.(7) - sqrt.(6) and B = sqrt.(6) - sqrt.(5), then 1) A > B
2) A = B
3) A < B
4) A ? B
5) None of these
Correct Answer: 3 Your Answer: Not Attempted Course: CAT Quantitative Answer Description
Ask faculty if you have any doubts
Asked by 9 months ago , View All Answers
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One kg of tea and one kg of sugar together cost Rs 95. If the price of tea falls by 10% and that of sugar rises by 20%, then the price of one kg of each combined comes to Rs 90. The original price of tea (in Rs/kg) is1)72
2)55
3)60
4)80
please explain this question .
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When a retailer states I am getting less margins from a vendor then it usually means less discount as % of MRP or Selling price .This less his other variable costs lead to profit . So his profit % is always a percentage of sales and not a % of cost , yet we calcualte profit as % of CP. Please explain
Asked by 10 months ago, View All Answers
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