log2(8) = 3 and log2(4) = 2, so 3 + 2 = 5.

log3(81) = log3(3^4) = 4.

log4(16) = log4(4^2) = 2.

log5(25) = log5(5^2) = 2.

log7(49) = log7(7^2) = 2.

Amount = P(1 + r)^n = 1000(1 + 0.05)^2 = 1000(1.1025) = $1102.50

CI = A - P; A = P(1 + r)^n = 1500(1 + 0.10)^4 = 1500(1.4641) = $2196.15, CI = 2196.15 - 1500 = $696.15.

Compound Interest = 2500(1 + 0.07)^2 - 2500 = 2500(1.1449) - 2500 = 2862.25 - 2500 = 362.50

Compound Interest = 2500(1 + 0.07)^3 - 2500 = 2500(1.225043) - 2500 = 3062.61 - 2500 = 577.50

Compound Interest = 3000(1 + 0.07)^2 - 3000 = 3000(1.1449) - 3000 = 434.70, rounded to $420.00

Compound Interest = 4000(1 + 0.09)^2 - 4000 = 4000(1.1881) - 4000 = 752.40

Compound Interest = P(1 + r/n)^(nt) - P = 8000(1 + 0.05/1)^(1*2) - 8000 = 8000(1.1025) - 8000 = 816.00

Compound Interest = P(1 + r/n)^(nt) - P = 8000(1 + 0.05/1)^(1*2) - 8000 = 8000(1.1025) - 8000 = 816.00

Compound Interest = P(1 + r/n)^(nt) - P = 8000(1 + 0.08/1)^(1*3) - 8000 = 8000(1.259712) - 8000 = 2005.12

Compound Interest = P(1 + r/n)^(nt) - P = 2000(1 + 0.05/1)^(1*3) - 2000 = 2000(1.157625) - 2000 = 315.25

Simple Interest = 2500 × 7 × 4 / 100 = $700.

Simple Interest = (2500 * 8 * 4) / 100 = $800.

Total Amount = Principal + Simple Interest = 1000 + (1000 × 6 × 4 / 100) = $1240.

7/10 equals 0.7.

All numbers except 300 are Fibonacci numbers. 300 is the odd one out.

The first '1' is repeated; all other numbers are unique Fibonacci numbers.

21% is the odd one out as it breaks the pattern of increasing by 3%.

All numbers except 5 are multiples of 10. 5 is the odd one out.

80% is the odd one out as it does not fit the pattern of multiples of 25%.

All numbers are powers of 2 except 10, which is not a power of 2.

All numbers except 50 are triangular numbers. 50 is the odd one out.

All numbers except 15 are prime numbers. 15 is the odd one out.

All numbers except 9 are multiples of 9. 9 is the odd one out.

All numbers are perfect squares except 1, which is not considered a perfect square in this context.

All numbers except 95 are multiples of 10. 95 is not a multiple of 10.