Olympiad/HOTS corner

Which of the following statements is/are incorrect

(i) Eighty four in Roman numeral is written as CXXXIV

(ii) There are seven zeroes in $1$ crore

(iii) There are ten thousand milligram in $1 \mathrm{kg}$

(iv) The smallest $4$-digit umber formed by using all the digits $4, 3, 0, 8$ without repetition is $3048$

Latika, Garima and Sanchi draw $3$ cards each from $9$ cards numbered from $1$ to $9$.
Latika: L; Garima: G; Sanchi: S
L: The product of my numbers is $48$
G: The sum of my numbers is $15$
S: The product of my numbers is $63$
What is the sum of the number on the cards drawn by Latika and Sanchi?

A truck can carry $582$ boxes of biscuits weighing $16 \mathrm{kg}$ each, whereas a van can carry $359$ such boxes. Find the total weight that can be carried by both the vehicles

Select the correct statement

If a number is formed by interchanging the digits at tens and thousands places of $7939$, then which of the following is correct?

Which of the following statements is incorrect?

$80325901$ can be written in words as

Latika's monthly salary was $₹30525$. She spent $₹1800$ and saved the rest. How much did she save in a year?