How many triangles are there in the given figure?

In a certain code language, 'DUCK' is written as 'FSEI' and ‘FISH’ is written as ‘HGUF’. How will 'FROG' be written in that language?

Which of the following numbers will replace the question mark (?) in the given series?
 23, 28, 280, 295, 5900, ?

The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, EXCEPT one. Find that odd number pair.

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 50 * 2 * 3 * 30 * 10 * 40 * 20

Study the given pattern carefully and select the number that can replace the question mark (?) in it.
 First row: 17, 26, 60
 Second row: 8, 15, 31
 Third row: 11, 19, ?
 (NOTE: Operations should be performed on the whole numbers, without breaking down the number into its constituent digits. For example, 13 – Operations on 13 such as adding/deleting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 39 * 4 * 61 * 18 * 4 * 49 * 7 * 30

Which letter-cluster will replace the question mark (?) to complete the given series?
 TBNF, CJUL, LRBR, UZIX, ?