Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 55 · 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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
2. 2.🧩 Vihaan is 10 years old. Kabir is older than Vihaan. How old is Kabir? (a) 15 (b) 12 (c) 11 (d) not enough info
3. 3.🧩 Ishaan is 11 years old. Arjun is 5 years older than Ishaan. How old is Arjun? (a) 5 (b) 16 (c) not enough info (d) 17
4. 4.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
5. 5.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
6. 6.🧩 A box has 8 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 36 (b) not enough info (c) 12 (d) 32
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
12. 12.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
14. 14.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
15. 15.🥭 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 mango is sweet (c) yes, it is certain (d) no, check more
16. 16.🧩 Kabir is 7 years old. Aarav is 6 years older than Kabir. How old is Aarav? (a) 6 (b) 14 (c) not enough info (d) 13
17. 17.🧩 Kabir bought 2 balls for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹60 (c) not enough info (d) ₹110
18. 18.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
20. 20.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
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Ishaan is 9 years old. Ananya is 5 years older than Ishaan. How old is Ananya? (a) 15 (b) 5 (c) 14 (d) not enough info
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Diya bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹25 (c) not enough info (d) ₹20
25. 25.🧩 Tara bought 4 markers and a cap for ₹280 in all. Each marker cost the same. What did one marker cost? (a) ₹70 (b) ₹276 (c) ₹280 (d) not enough info
26. 26.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
27. 27.🧩 Arjun is 10 years old. Vihaan is 4 years older than Arjun. How old is Vihaan? (a) 15 (b) 14 (c) 4 (d) not enough info
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking one friend (d) asking the whole class
29. 29.🧩 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
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 9 PM
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Meera is 6 years old. Kabir is 3 years older than Meera. How old is Kabir? (a) 3 (b) not enough info (c) 9 (d) 10
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
34. 34.🧩 Diya bought 3 kites and a cap for ₹240 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹80 (c) ₹237 (d) ₹240
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
36. 36.🧩 A box has 6 rows of guavas, with 7 in each row. How many guavas are in the box? (a) not enough info (b) 49 (c) 42 (d) 13
37. 37.🧩 Kabir bought 2 pens and a water bottle for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹75 (c) ₹148 (d) ₹150
38. 38.🧩 Aarav is 9 years old. Vihaan is older than Aarav. How old is Vihaan? (a) 11 (b) 10 (c) 14 (d) not enough info
39. 39.🧩 A box has 6 rows of apples, with 6 in each row. How many apples are in the box? (a) 36 (b) 42 (c) 12 (d) not enough info
40. 40.🧩 Arjun is 7 years old. Rohan is 2 years older than Arjun. How old is Rohan? (a) 10 (b) not enough info (c) 2 (d) 9

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