Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 319 · 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.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
2. 2.🧩 Ananya bought 5 mangoes and a lunch box for ₹240 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹235 (c) ₹48 (d) ₹240
3. 3.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
6. 6.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
7. 7.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
12. 12.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
13. 13.🧩 Arjun bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹300 (b) ₹65 (c) not enough info (d) ₹60
14. 14.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
15. 15.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
16. 16.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 45 (b) not enough info (c) 13 (d) 40
17. 17.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
18. 18.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no, check more (d) no mango is sweet
19. 19.🧩 A box has 3 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 12 (b) 7 (c) 16 (d) not enough info
20. 20.🧩 Rohan bought 4 kites and a bag for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹136 (b) ₹140 (c) not enough info (d) ₹35
21. 21.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
22. 22.🧩 Saanvi is 7 years old. Arjun is older than Saanvi. How old is Arjun? (a) 8 (b) 12 (c) 9 (d) not enough info
23. 23.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 32 (b) 12 (c) 36 (d) not enough info
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
25. 25.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
27. 27.🧩 Vihaan is 7 years old. Meera is older than Vihaan. How old is Meera? (a) 12 (b) 8 (c) 9 (d) not enough info
28. 28.🧩 Ananya bought 3 notebooks for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹105 (d) ₹35
29. 29.🧩 Kabir is 10 years old. Arjun is older than Kabir. How old is Arjun? (a) 12 (b) 15 (c) not enough info (d) 11
30. 30.🧩 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
31. 31.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
32. 32.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 5 PM (c) not enough info (d) 8 PM
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
34. 34.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
35. 35.🧩 Aarav is 6 years old. Ananya is older than Aarav. How old is Ananya? (a) 7 (b) 11 (c) 8 (d) not enough info
36. 36.🧩 Meera is 11 years old. Arjun is older than Meera. How old is Arjun? (a) 13 (b) 16 (c) 12 (d) not enough info
37. 37.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) not enough info (b) 9 (c) 90 (d) 18
38. 38.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
39. 39.🧩 A box has 7 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 14 (b) not enough info (c) 49 (d) 56
40. 40.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM

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