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Numerical Ability
Number System
In all four digit numbers(i.e) from 1000 to 9999. How many times the number 2 is used?
Read Solution (Total 6)
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- If you fix 2 in units place, the remaining places can be filled in 9, 10, 10 ways. We can only fill the left most place only in 9 ways because 0 cannot be used. So
Units place: 9*10*10*1=900
Tens place: 9*10*1*10=900
Hundreds place: 9*1*10*10=900
Thousands place:1*10*10*10=1000
Total: 900+900+900+1000=3700 - 9 years agoHelpfull: Yes(23) No(2)
- In 100 it comes 21 times then in 10000 2100 times + 100 *10 for 200,201,202,...299
Total 2100+1000=3100 - 9 years agoHelpfull: Yes(6) No(8)
- In 100 it comes 20 times 2 12 32...92 =9
20 21 22 23 ...29 =11 total 11+9= 20
In 1000 it comes 20*10=200
In 9000 it comes 200*9=1800
200..299 100 times
100*9=900
2000..2999 1000 times
Total=1000+900+1800=3700 - 9 years agoHelpfull: Yes(4) No(2)
- total 4 digit numbers that we can form is 9*10*10*10=9000
total 4 digit numbers that we can form without using 2 is 8*9*9*9=5832
so 4 digit no. with 2
9000-5832=3168
- 9 years agoHelpfull: Yes(3) No(1)
- confuse mat karo bhai sbko@ parth
- 9 years agoHelpfull: Yes(0) No(0)
- Explain it...
- 9 years agoHelpfull: Yes(0) No(0)
CTS Other Question
Pooja told narmadha, "I am four times as old as you were when I was your present age and also I am 9 years older than you" . what is pooja's age?
Since the late 1970s when the technology of sex determination first came into being, sex selective abortion has unleashed a saga of horror. Experts are calling it “sanitized barbarism”. Demographic trends indicate the country is fast heading towards a million female foetuses aborted each year.
Although foetal sex determination and sex selection is a criminal offence in India, the practice is rampant. Private clinics with ultrasound machines are doing brisk business. Everywhere, people are paying to know the sex of an unborn child and paying more to abort the female child. The technology has even reached remote areas through mobile clinics. Dr. Puneet Bedi, obstetrician and specialist in foetal medicine, says these days he hardly sees a family with two daughters. People are getting sex determination done even for the first child, he says.
If the 1991 Census showed that two districts had a child sex ratio (number of girls per thousand boys) less that 850; by 2001 it was 51 districts. Child rights activist Dr. Sabu George says foeticide is the most extreme form of violence against women. “Today a girl is several times more likely to be eliminated before a birth than die of various causes in the first year. Nature intended the womb to be safe space. Today, doctors have made it the most unsafe space for the female child”, he says. He believes that doctors must be held responsible- “they have aggressively promoted the misuse of technology and legitimized foeticide”.
1) Which of the following will Dr. George agree to?
(A) The girl child is as safe in the mother’s womb as after birth
(B) The girl child is safe in the mother’s womb in comparison to after birth
(C) The girl child is safer after birth as compared to mother’s womb
(D) None of these
2) What is the solution to the problem of female foeticide as envisioned by Dr. Bedi?
(A) Effective use of law
(B) Mass public outrage
(C) Comparison with Nithari killing
(D) Contempt towards doctors
3) What is the topic of the passage?
(A) Factual
(B) Biased
(C) Aggressive
(D) Sad
4) What is Akhila Sivadas’s opinion on the PCPNDT act?
The act is inconsistent
The act needs reform
The act encourages demand for foeticide
The act is sound, but needs enforcement