Related Questions

নিম্নের বিক্রিয়াটি পূরণ কর - 6Fe2+ + Cr2O72- + 14H+→6Fe3+ + ...... + 7H2O  
A    Cr2+
B Cr3+
C 2Cr3+ 
D     Cr(OH)3
Cr₂O₇²⁻+14H + ?→2Cr³+7H₂O বিক্রিয়াটি সম্পন্ন করতে কয়টি ইলেকট্রন প্রয়োজন?
A 3টি
B 6টি
C 9টি
D 2টি
Which number shoud replace the question mark ? 2, 8, 18, 32, ?,
A 38
B 42
C 48
D 50
What number should replace the question mark?
A 18
B 68
C 81
D 44
Which number should replace the question mark?
A 4
B 5
C 6
D 7
what number should replace the question mark? 61, 54, 62 ,? 63 , 56, 64
A 55.5
B 62.5
C 55
D 62
what number should replace the question mark/
A 32
B 28
C 27.5
D 31
Look at lines borth across and down and work out what numbers should replace the question mark?
A 6
B 12
C 8
D 4
The average of a series of consecutive odd numbers is 33. If there are 7 numbers in the series, what is the lowest number in the series ?
A 25
B 27
C 29
D 37
Average mark in Math in a class of 40 students is 45. Average mark of all the 30 boys is 50. Then the average mark obtained by the girls is :
A 30
B 35
C 25
D 40

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