Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 306 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Aarav bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) ₹15 (c) ₹20 (d) not enough info
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Aarav is 10 years old. Tara is older than Aarav. How old is Tara? (a) not enough info (b) 11 (c) 12 (d) 15
4. 4.🧩 Ishaan bought 4 notebooks for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹10 (c) ₹40 (d) ₹15
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
6. 6.🧩 A box has 7 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 28 (b) 32 (c) 11 (d) not enough info
7. 7.🧩 A box has 4 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 12 (b) 32 (c) not enough info (d) 40
8. 8.🧩 Aarav bought 2 kites and a water bottle for ₹110 in all. Each kite cost the same. What did one kite cost? (a) ₹110 (b) ₹55 (c) not enough info (d) ₹108
9. 9.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) no, check more (d) yes, mangoes match
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Ananya is 9 years old. Arjun is older than Ananya. How old is Arjun? (a) 14 (b) 11 (c) 10 (d) not enough info
12. 12.🧩 Aarav bought 6 balls and a cap for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹134 (b) not enough info (c) ₹140 (d) ₹23
13. 13.🧩 Vihaan bought 5 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹75 (b) not enough info (c) ₹20 (d) ₹15
14. 14.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
18. 18.🧩 Arjun bought 6 kites and a cap for ₹290 in all. Each kite cost the same. What did one kite cost? (a) ₹284 (b) not enough info (c) ₹290 (d) ₹48
19. 19.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
22. 22.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 8 (d) 80
23. 23.🧩 A box has 6 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 14 (c) 56 (d) 48
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Aarav is 9 years old. Vihaan is older than Aarav. How old is Vihaan? (a) 11 (b) 14 (c) 10 (d) not enough info
27. 27.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
28. 28.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Ananya bought 4 notebooks and a bag for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹196 (c) ₹50 (d) ₹200
30. 30.🧩 Arjun is 9 years old. Ishaan is 3 years older than Arjun. How old is Ishaan? (a) 3 (b) not enough info (c) 13 (d) 12
31. 31.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) 63 (b) not enough info (c) 56 (d) 15
32. 32.🧩 A box has 3 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 7 (b) 12 (c) not enough info (d) 16
33. 33.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
34. 34.🧩 Diya is 12 years old. Nisha is older than Diya. How old is Nisha? (a) 14 (b) 13 (c) 17 (d) not enough info
35. 35.🧩 Ishaan is 6 years old. Kabir is 9 years older than Ishaan. How old is Kabir? (a) 9 (b) not enough info (c) 16 (d) 15
36. 36.🧩 Aarav bought 4 kites and a cap for ₹270 in all. Each kite cost the same. What did one kite cost? (a) ₹270 (b) not enough info (c) ₹67 (d) ₹266
37. 37.🧩 Nisha is 9 years old. Ananya is 5 years older than Nisha. How old is Ananya? (a) 15 (b) 5 (c) 14 (d) not enough info
38. 38.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
39. 39.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
40. 40.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 2 PM (c) 4 PM (d) not enough info

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