Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 297 · 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.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 5 PM
2. 2.🧩 Vihaan bought 5 notebooks and a lunch box for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹135 (b) ₹28 (c) ₹140 (d) not enough info
3. 3.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Nisha is 12 years old. Diya is older than Nisha. How old is Diya? (a) not enough info (b) 17 (c) 13 (d) 14
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Aarav bought 4 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) ₹35 (c) ₹30 (d) not enough info
9. 9.🧩 Meera is 6 years old. Tara is 4 years older than Meera. How old is Tara? (a) 11 (b) not enough info (c) 4 (d) 10
10. 10.🧩 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
11. 11.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
12. 12.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) no mango is sweet (d) yes, it is certain
13. 13.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) guessing (d) asking one friend
15. 15.🧩 A box has 5 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 11 (b) not enough info (c) 30 (d) 36
16. 16.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
17. 17.🧩 Aarav bought 6 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) not enough info (c) ₹30 (d) ₹25
18. 18.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 36 (c) 30 (d) 11
19. 19.🧩 Vihaan is 6 years old. Arjun is 2 years older than Vihaan. How old is Arjun? (a) not enough info (b) 2 (c) 8 (d) 9
20. 20.🧩 Vihaan bought 3 notebooks and a cap for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹60 (c) ₹177 (d) not enough info
21. 21.🧩 Nisha is 7 years old. Kabir is 7 years older than Nisha. How old is Kabir? (a) not enough info (b) 7 (c) 15 (d) 14
22. 22.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
25. 25.🧩 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
26. 26.🧩 A box has 5 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 11 (b) 36 (c) 30 (d) not enough info
27. 27.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
28. 28.🧩 A box has 8 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 72 (b) 81 (c) 17 (d) not enough info
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
30. 30.🧩 Arjun is 12 years old. Kabir is 5 years older than Arjun. How old is Kabir? (a) 5 (b) not enough info (c) 18 (d) 17
31. 31.🧩 Saanvi bought 5 markers for ₹175 in all. Each marker cost the same. What did one marker cost? (a) ₹175 (b) ₹40 (c) ₹35 (d) not enough info
32. 32.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
33. 33.🧩 Arjun is 11 years old. Nisha is 9 years older than Arjun. How old is Nisha? (a) 20 (b) not enough info (c) 9 (d) 21
34. 34.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
35. 35.🧩 Aarav bought 5 notebooks and a bag for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹66 (b) not enough info (c) ₹325 (d) ₹330
36. 36.🧩 A box has 7 rows of apples, with 5 in each row. How many apples are in the box? (a) 35 (b) 12 (c) not enough info (d) 40
37. 37.🧩 Rohan bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹45
38. 38.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
40. 40.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence

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