Related Questions

Which scientist discovered the radioactive element radium?
A Isaac Newton
B Marie Curie
C Benjamin Franklin
D None of these
The ---- of radium brought much fame to Madame Curie
A invention
B use
C detection
D discovery
Radium এর ভরক্রটি 0.95 amuহলে উহার বন্ধন শক্তি ক্যালরীতে কত হবে?
A 884.92 cals
B 14.19×10-4 cals
C 3.39×10-11 cals
D 932.5 cals
The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?
A 10
B 8
C 12
D 15
The average mark obtained by 10 students was 6 and the average mark obtained by 6 other students was 10. What was the average mark obtained by all 16 students?
A 10
B 8
C 7.5
D 8.5
The average mark obtained by 10 students was 6 and the average mark obtained by 6 students was 10. What is the average mark obtained by all 16 students ?
A 10
B 8
C 7.5
D 8.5
The total number obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What is the average mark obtained by him in Physics and Mathematics together?
A 40
B 60
C 120
D Cannot be determined
The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?
A 10
B 11
C 8
D 9
If the digit in the unit's place of a two-digit number is halved and the digit in the ten's place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true ?
A Sum of the digits is a two-digit number
B Digit in the unit's place is half of the digit in the ten's place
C Digit in the unit's place and the ten's place are equal
D Digit in the unit's place is twice the digit in the ten's place
The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always
A 1
B > 1
C Unpredictable

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